/*声明Container函子*/
class Container {
    constructor(value) {
        this._value = value;
    }
    static of(value) {
        return new Container(value);
    }
    map(fn) {
        return Container.of(fn(this._value));
    }
}
/* 声明Maybe函子 */
class Maybe {
    constructor(x) {
        this._value = x;
    }
    static of(x) {
        return new Maybe(x);
    }
    isNothing() {
        return this._value === null || this._value === undefined;
    }
    map(fn) {
        return this.isNothing() ? this : Maybe.of(fn(this._value));
    }
    join() {
        return this._value;
    }
}
/* 导出函子 */
module.exports = { Maybe, Container };